If it's too hard to undo all of your changes to find out which one is responsible, you can rename the folder where you have Celestia (e.g. to Celestia_crashes) and then re-install Celestia using the old name. If the crash is due to one of the changes, then that fresh copy should run fine. Then you can start making changes until it fails. You still can use the old version of Celestia with all of its Addons by clicking on /running that old version of Celestia in its new folder.

Cel: URLs and scripts always communicate with the copy of Celestia that's running. While the old copy is running, Cel: URLs will interact with that old version. They won't start the new one.

I have the same bug with Celestia 1.6.1Windows10 64bitsI know that other users also have this bug under Windows XPSomeone told me about Celestia 1.6.1 svn 5159 with a slightly larger executable and that does not produce this bug!

My celestia.exe file from the Celestia Motherworld package makes 2778ko and produces an error when clicking on an empty place in space. The file is dated 08-05-2011.Your celestia.exe file from celestia 1.6.1 svn 5159 is 3187ko. I do not know where you found it, but thank you. I'll try it.

Yes, John, with this version svn 5159, there is always the same error. On the other hand, LUT4 seems better to load than with 1.6.1 of origin.I do not think Windows 10 is at issue because someone from the LUT staff had this error on Windows XP Russian.It will be necessary that I make a new installation clean of 1.6.1 without "addons" to make tests.For my part, I had thought that instructions controlling the abscence of selection in Celestia had been forgotten in the programming, but not all have the error.NB: This error, I had it also with Celestia EPV3

The Goto function does a bizarre thing:They take it under the surface (negative distance) and you can not increase or decrease this distance with the mouse.Something has been changed in the programming of the Celestia function in this version. Perhaps this is a clue to those who have mistakes with LUT.I just tried in the menu Celestia [Navigation] / [Discovery Guide] / [destination] / Pluto-Charon:The [Go To] button takes us under the surface.

gironde wrote:They take it under the surface (negative distance) and you can not increase or decrease this distance with the mouse.

Hm I don't know if this is somehow connected, but I rarely experience that Celestia "breaks": I suddenly get thrown at a distance of several gigparsecs and when trying to go to any object, the distance changes but I'm still stuck gigaparsecs away. Only restart helps... No idea what circumsances produce this bug.

This problem of Go To, I only have it on celestia.exe svn 5159, on the basic version (2778ko) I do not have it.

The error that happens when clicking in vacuum, I have it on both versions.

On my second PC, I completely reinstalled celestia-win32-1.6.1.exe, without adding anything or modifying it. There is no mistake.I'm thinking more and more about a problem on an addon. I try by handing all my addons except realistic milky way since it is a very large object when we are in visual of the Earth. Result: always error.

Croc, I know very well because I work with him on LUT.

Thanks for everything, I will continue to look for the addon responsible.

gironde wrote:The Goto function does a bizarre thing:They take it under the surface (negative distance) and you can not increase or decrease this distance with the mouse.Something has been changed in the programming of the Celestia function in this version. Perhaps this is a clue to those who have mistakes with LUT.I just tried in the menu Celestia [Navigation] / [Discovery Guide] / [destination] / Pluto-Charon:The [Go To] button takes us under the surface.

That bug has not been addressed yet. It makes the difference between the official 1.6.1 Celestia version and all the SVN versions since 5063. You can find how to-do by yourself here

Thank you for this information.I can not implement it because I do not have the file celx_observer.cpp. Indeed, I have the official version installed.I tried to replace the official celestia.exe file with that of the svn 5159 version and it is this one that produces the bug Go To. So if I understand correctly, the .exe file is incompatible with the official version.

This replacement operation, I had done because I have another bug when I click in the space vacuum with the official version (and even with svn). Now I think an addon must be involved. It remains for me to find out which one.